Heating means for carbureters.



I. H. LEPPER.

HEATING MEANS FOR CARBURETERS. APPLlcATl'oN FILED JUNE 21.1916.

1,222,426. l Patented Apr. 10, 1917.

outer end of the coil 16 is secured to the inner end of the metal core or stein 18 by passing the end of the coil through the longitudinal bore.19 formed in the inner end of the core 18 and opening into the scarf or cut away portion' 20, this end of the coil 16 is drawn through the bore` 19 for a sutlicient distance so that the same may be wrapped around the core 18 in the manner shown at 21 and is prevented from slipping otl" the inner end orn the metal core 18 by the head 22 formed upon the inner end of the metal core 18.

'lhe metal core 18 extends through the longitudinal 4bore 23 -i'oriued centrally vthrough the insulating core 14 with its head 22 positioned within the recess 24 formed in the inner4 end ot the insulating core 14 and surrounding the inner end oit the bore 23, and for retaining the metal core 18 and its head 22 operatively mounted within the insulating core 14, the metal core 18 is formed with the screw threaded outer end 25, upon which is screw threaded the cup shapedffut 26 which engages the reduced `outer end ot' the insulating core 14, and also threaded lupon the end 25 of the metal core 18 is the wire binding nut 27 and the lock nut 28 for engaging the outer face of the binding nut 27 for preventing its casual rotation. y

The heater 9 and its coil 16, the insulating core 14 and the metal core 18 therein, form. when assembled together, a substantially unitary structure, and these parts are inserted or projected into and through the plug or housing 4 in a manner so that the head 13 of the insulating core 14 will be positioned within the front chamber 7 of the plug 4,

and the heater 9 will project th'roughiathe central bore of the plug 4 and the rear chamber 6 and suspended therein in spaced relation from the inner surrouinlin0,a walls of the plug 4, the heater 9 preferably projectingrlior a distance beyond the inner end of t e plug or housing 4, and for retaining these parts in their respective operative positions within the plug or housing 4, the

bushing 29 is provided.

The bushing4 29 is formed with a smooth inner wall for snugly engaging the cap 12 of the heater 9, within which is snugly seated the head 13 of the insulating core 14 and the bushing 29 is formed with an eX- ternally screw threaded outer wall for engaging the inner screw threaded wall oi' the front chamber 7. Upon the outer edge of the bushing or locking ring 29 is formed the broad annular head 30, which overhangs the inner smooth wall of the bushing 29 to provide the inner annular shoulder 31, the head also overhanging the screw threaded outer wall of the bushing 29 to provide the outer annular shoulder 32, the periphery of the head 30 of the bushing 29 being prefiguanas erably formed yhexagonal for receiving a suitable wrench, so that, when the bushing or locking ring 29 is screwed inwardly, the inner shoulder 31 of its head 30 will bind against the washer 33 interposed between the shoulder 31 and the annular shoulder 34 formed between the head 13 and the body portion of the insulating core 14, and the outer shoulder 32 of the head 30 of the bushing 29 will bind against the washer 35 interposed between the shoulder 32 and the outer end of the plug or housing 4, though i the washer 35 may be omitted if desired, and

at the Sametime the inner end of the bushing 29 will bind against the,- washer 36 .interposed between the inner end of the bushing 29 and the flange '11,` of the heater 9 on the one side and the front wall of the annular rib or shoulder 8 within -the plug or housing 4, whereby the heater 9 and the ine sulating core 14 and their accessories are rmly secured in operative position within the plug or housing 4, and at the same time the washers 33, 35 and 36 provide a tight joint at their respective locations for preventing any leakage of the liquid fuel from the carbureter bowl 1 through the heating device, and which washers are preferably formed of soft copper though the same may be formed of or combined withy any other suitable material that will provide a liquid tight joint. Y

F or energizing the coil 16 the positive wire 37 is provided which leads from any suitable source of electrical `supply controlled by a suitable switch, and has one end suitably secured to the threaded end 25 of the metal core or stem 18 and held firmly between the cup shaped nut 26 and the binding nut 27 upon the threaded end 25 of the inetal core 18. The current from the wire 37 is conducted through the metal core 18 to the heating coil 16 forenergizing the same, and is thereafter conducted from the inner end of the coil 16 through the metal portion of the heater 9, the bushing 29, the plug or housing 4, and the wall of the carbureter bowl 1 tothe binding post 38, provided with the binding screw 39, and thence returned to the source of electrical supply through the return wire 40 having one end suitably secured to the binding post 38 and between the same and the binding nut 39. TWhile l prefer to return the current from the heating coil 16 in the manner just described, the current, however, may pass from the carburetor bowl to the engine construction or frame work thereof and then be returned to the source of electrical supply or the same may be grounded in any suitable manner desired.

The metallic portions of the parts constituting the invention may be formed of any suitable material, but Ipreferably form sov 11 and cap 12 thereof of steel, and the insulating core 14 and the insulating lining 15 Within the heater 9 may be formed of any suitable insulating material, but I preferably form the core 14 of porcelain, and the lining 15 of mica.

While the manner of positioning the heating device with respect to the carbureter bowl, as disclosed in the drawings, is shown for the sake of illustration and clearness, I desireit to be understood that I am not restricted to this exact positioning of the heating device upon the carbureter bowl, as the screw threaded opening 2 in the Wall of the carbureter bowl 1 mav be formed at any other desired and suitable point in the Wall of the carbureter bowl, either formed in any of the carbureters now in use or formed in the same during their course of manufacture, and the heating device capable of being mounted in the screw thi'eaded opening in the wall of the carbureter bowl in either case, whereby the liquid fuel within the carbureter bowl will surround the heater and be efficiently heated thereby.

Having described my invention, what I c'laim as new and desire to secure by Letters Patent, is t A1. In combination with a carbureter bowl having a threaded opening, a heating device comprising a housing having a -threaded extension positioned in the threaded opening of the carbureter bowl, an annular shoulder formed within the. housing, an insulating core in the housiiigga casing positioned in the housing and having a portion thereof engaging the shoulder, one end of the easing extending beyond the inner end of the housingand terminating Within the earbureter bowl, a. conducting element extending through the core, a heating element within the casing, one of the ends of the heating element making connection with the conducting element, the opposite end thereof extending through the casing, and means cooperating with the annular shoulder for holding the casing in position in the housing.

2. In combination with a carbureter boivl having a threaded opening, a heating device comprising a housing liavi shoulder formed intermediate the i thereof, a cylindrical heater element a shoulder, positioned iii the housing f spaced from the interior Walls thereof to form a chamber, means coperating with the shoulders for holding 'the heater elem-enJ i position, an insulating core having metallic core positioned in one ec heater element, a heating coil cylindrical heater element, one end of c coil extending through the heater element, and an enlarged head for holding the opposite end of the heating coil in engage 4ent with the central metallic core.

3. In a device of the character described, the combination with a carburetei 'bevil containing a liquid fuel, of a housing secured through a Wall of said carhuieter bowl, an insulating core having one end partially positioned Within said housing, a metallic casino* also artiallf aositioned n n u D n 1 n Within said housing and having one ei embracing that portion of the insula core Within said housing for supporting said casing in suspended position, an insulatinO lininry within said casino a metallic C b @i lockiiivf rin(r embracing that portion or e b. A

metallic casing upon said insulating core,

metallic core Within said insulating core, a

heating coil Within said casing having one of its ends projecting through the closed end of said casing and secured to the metallic portion thereof, and its opposite end secured upon one' end of said metallic core., and means for connecting .the opposite end of said Ametallic core to a source of electrical supply for establishing a. circuit through.

said heating coil and the metallic parts in interconnection therewith for eiierg said coil for rendering the same active for heating said liquid fuel.

In testimony uf'hereof I have signed name to this specification in the presence of tivo subsc ibing Witnesses.

JNOHN HENRY .lVitnc'sses IiuiNii T. Liiiernii, I). A. EDFERN. 

